Solr DIH — How to handle deleted documents?

Question

I\'m playing around with a Solr-powered search for my webapp, and I figured it\'d be best to use the DataImportHandler to handle syncing with the app via the database. I li

Answer 1

I like to have a "deleted" flag so I don't actually delete my data! Depends on how paranoid you are. I like Mauricio's suggestions...

Answer 2

These are your options:

• Use DIH special commands $deleteDocById or $deleteDocByQuery (requires Solr 1.4+)
• Use the clean parameter of DIH to delete the whole index before importing.
• Use preImportDeleteQuery to define what's going to be cleaned up before importing. (requires Solr 1.4+)
• Use database triggers instead of DIH to manage updating the index.
• If you're using some sort of ORM use its interception capabilities instead of DIH. For example you can use hibernate events to update the index on update, insert or delete.